Gas governor or pressure-regulator



(No Model.)

W. H. BRADLEY.

GAS GOVERNOR 0R PRESSURE REGULATOR. No. 390,064".

Patented Sept. 25, 1888.

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7 tlNiTEn STATES Ararat tr es,

WILLIAM H. BRADLEY, OF ALLEGHENY, PENNSYLVANIA.

GAS GOVERNOR OR PRESSURE-REGULATOR.

SPECIPISATION forming part of Letters Patent No. 390,064, dated September 25, 1888.

Application filed December 9, 1887. Serial No 257,441. (No model.)

To aZZ whom it may concern.-

Be it known that I, l/VILLIAM'II. BRADLEY, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Gas Governors or PressureRegulators, of which the following is a specification.

My invention relates to gas governors or pressure-regulators of the type shown, described, and claimed in Letters Patent of the United States Nos. 352,072, 054,844, and 361,908, granted to me upon the 2d day of November, 1886, the 21st day of December, 18816, and the 26th day of April, 1887, respectwe v.

It is the object of my invention to provide an apparatus capable of being attached to the supply or service pipes of wall, pendent, or other lights, whereby the consumption of gas 1s maintained in proper proportion to the number of burners actually in use, or, in other words, thepressure is so controlled that if only one-half or one-third the whole number of burners are lighted the intensity and size of each gas-flame will be the same as it would be if the whole number were in use simultaneously.

In the construction ofgovernors ofthis class a mercury seal is employed to permit the free movement of the valvestem and at the same time prevent the leakage of gas. It has been found in practice that sudden leaps in pressuresuch as may take placein the pipes taki ng gas from natural sources-are liable to cause the mercury in the cup to splash or rise over the dome of the mercury cup or shield, thereby causing a waste, which, if repeated, may disable the apparatus. Moreover, if employed upon steamers or railways, the oscillation of the casing would be extremely liable to produce the same result.

It is thepurpose of my invention, therefore, to provide simple and inexpensive means whereby these objections may be obviated and the regulator thereby adapted to use in con trolling the fiow of natural'gas or upon railways or other conveyances.

The invention consists to this end in the several novel features of construction and new combinations of parts hereinafter fully set forth, and definitely pointed out in the claims.

In the accompanying drawings, Figure 1 is a central vertical section of an apparatus enr bodying my invention. Fig. 2 is a detail section of the dome of the mercury-cup, showing the valve-stem passing through the same, the auxiliary shield being shown in dotted lines and in its highest position.

In the said drawings, the reference-numeral l designates the casing or shell within which the parts are arranged, said casing having a gas-inlet, 2, and an outlet, 3. Between the inlet and outlet is a valve-chamber, 4, so arranged that the gas to reach the outlet must pass through said chamber, a passage, 5, be ing provided leading to the latter from the exit-pipe.

Within the chamber 4, I arrange a valve stem, 6, carrying valves 7 and 8, which close upon valve-seats 9 and 10, respectively. The valve-stem passes above the chamber 4 and through the center of a dome-shaped shell, 12, partly surrounding the said chamber and cutting off all access to the casing above said dome, save through the central opening for the valve-stem. A crown-shaped flange, l3, surrounds the dome 12, leaving an annular space, 14, to form a mercury chamber or cup.

Upon the valve-stem above the dome is mounted a cup-shaped shell, 15, inverted and having its edge lying in the mercury-cup. The stem 6 passes through the shell and is fastened thereon with a tight joint by means of nuts 16 on opposite sides and an interposed washer or washers, 17. Above the shell the stem is prolonged into a chamber, 18, where it is balanced by suitable weights, 19.

Upon the summit of the dome 12, I form a central boss, 20, having an opening for the valve-stem, and' between the lower nut 16 and the sealing-shcll15 is interposed an auxiliary shell,2l, which incloses the boss 20, but not so closely as to have actual contact there with. The position of this auxiliary shell is so adjusted by means of the nuts 16 that when the valve-stem 6 is at its lowest point the edge of the said auxiliary shell will be in close proximity to or in actual contiguity to the dome at the base of the central boss, 20. The proportions of the parts are such that the rise of the stem 6 to seat the valves will not raise the edge of the auxiliary shell so far as the top of the boss, as shown in Fig. 2. If, now, the

It will be seen that when the outside press-- ure is one or more pounds and the governed pressure is less-saysi'x to eight tenths-when the taps are all shut off the inside pressure remains the same and closes the valves. \Vithout this small dome the outside would leak in so as to make balance pressure equal on both sides of the governor.

What I claim is- 1. In a gas governor or regulator, the combination, with the dome of the mercury cup or shield, having a central elevation or boss, and with a valve'stem passing through an opening in the same, of an auxiliary shell or shield mounted on said stem and surrounding the boss, substantially as described.

2. The combination, with the dome of the mercury-cup, having a central boss surmounting the same, and with a valve-sten1 passing through a central opening in said boss, of a sealing shell and an auxiliary shell, both mounted on the valve-stem, the former dipping in the mercury-cup and the latter surrounding the boss, substantially as described.

3. The combination, with the dome of the mercury-cup, having a central boss surmountin it, and with a valve-stem passing through an opening in said boss, of a sealing-shell and an auxiliary shell, the latter arranged beneath the former and inclosing or surrounding the boss, both shells being adj ustably mounted on said valvestem, substantially as described.

4. The combination, with the dome of the mercurycup, having a central boss, 20, of the valve-stem 6, the sealing-shell 15, the auxiliary shell 21, surrounding the boss, and the nuts 16, turning on a threaded portion of the valve-stein, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM l'l'. BRADLEY.

\Vi t nesses:

SAMUEL B. Tuoiirrson, A. Fnnsnn LnnuA'rn. 

